<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<button id="btn">点我发送请求</button>
	<script src="/js/ajax.js"></script>
	<script>
		// 获取按钮
		var btn = document.getElementById('btn');
		// 为按钮添加点击事件
		btn.onclick = function () {
			ajax({
				type: 'get',
				url: 'http://localhost:3001/cross',
				success: function (data) {
					console.log(data)
				}
			})
		};
	</script>
</body>
</html>